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1. CN101606107 - Method and apparatus for encoding computer-generated holograms in pixelated light modulators

Amt
China
Aktenzeichen/Anmeldenummer 200780033358.2
Anmeldedatum 27.08.2007
Veröffentlichungsnummer 101606107
Veröffentlichungsdatum 16.12.2009
Erteilungsnummer 101606107
Erteilungsdatum 25.01.2012
Veröffentlichungsart B
IPC
G03H 1/08
GSektion G Physik
03Fotografie; Kinematografie; vergleichbare Techniken unter Verwendung von nicht optischen Wellen; Elektrografie; Holografie
HHolografische Verfahren oder Vorrichtungen
1Holografische Verfahren oder Vorrichtungen, die sichtbares Licht, infrarote oder ultraviolette Wellen zur Erzeugung von Hologrammen oder von Bildern aus den Hologrammen verwenden; besondere Einzelheiten dazu
04Verfahren oder Vorrichtungen zur Herstellung von Hologrammen
08Synthetische Herstellung von Hologrammen
G03H 1/22
GSektion G Physik
03Fotografie; Kinematografie; vergleichbare Techniken unter Verwendung von nicht optischen Wellen; Elektrografie; Holografie
HHolografische Verfahren oder Vorrichtungen
1Holografische Verfahren oder Vorrichtungen, die sichtbares Licht, infrarote oder ultraviolette Wellen zur Erzeugung von Hologrammen oder von Bildern aus den Hologrammen verwenden; besondere Einzelheiten dazu
22Verfahren oder Vorrichtungen zur Gewinnung eines optischen Bildes aus Hologrammen
CPC
G03H 1/02
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
02Details ; of features involved during the holographic process; Replication of holograms without interference recording
G03H 1/0808
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
04Processes or apparatus for producing holograms
08Synthesising holograms, ; i.e. holograms synthesized from objects or objects from holograms
0808Methods of numerical synthesis, e.g. coherent ray tracing [CRT], diffraction specific
G03H 1/2294
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
22Processes or apparatus for obtaining an optical image from holograms
2294Addressing the hologram to an active spatial light modulator
G03H 2001/0224
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
1Holographic processes or apparatus using light, infra-red or ultra-violet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
02Details ; of features involved during the holographic process; Replication of holograms without interference recording
0208Individual components other than the hologram
0224Active addressable light modulator, i.e. Spatial Light Modulator [SLM]
G03H 2210/441
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
2210Object characteristics
40Synthetic representation, i.e. digital or optical object decomposition
44Digital representation
441Numerical processing applied to the object data other than numerical propagation
G03H 2210/454
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
HHOLOGRAPHIC PROCESSES OR APPARATUS
2210Object characteristics
40Synthetic representation, i.e. digital or optical object decomposition
45Representation of the decomposed object
454into planes
Anmelder Seereal Technologies SA
视瑞尔技术公司
Erfinder Leister Norbert
诺伯特·莱斯特
Vertreter he xiaomeng
北京连和连知识产权代理有限公司 11278
Prioritätsdaten 102006042467 09.09.2006 DE
Titel
(EN) Method and apparatus for encoding computer-generated holograms in pixelated light modulators
(ZH) 像素化光调制器中编码计算机生成全息图的方法和装置
Zusammenfassung
(EN) The object is to largely eliminate the errors which arise in the reconstruction of a hologram, calculated point by point, as a result of the encoding of said hologram into pixels of finite extent. The invention achieves the object by means of a method in which the common wavefront calculated from the object sectional planes (6, 7, 8) is multiplied by the inverse transform of the pixel shape and pixel transparency in the viewer's window (11) before the wavefront modified by the multiplication is transformed to the hologram plane (14) and encoded as an amplitude and/or phase distribution of the hologram in the pixels of the light modulator (9, 91). This method is implemented in a corresponding apparatus which contains an additional memory unit for providing a Fourier transform or its inverse Fourier transform and also a multiplication unit.
(ZH)

本发明的目的是很大程度上消除全息图重建中逐点计算产生的错误,该错误是由上述全息图编码到有限范围的像素引起的。本发明的目的通过以下方法实现:将由目标截面(6、7、8)计算得到的普通波前,在被乘法运算修正的波前变换成全息面(14)并且以全息图的振幅分布以及/或者相位分布的形式在光调制器(9,91)的像素中编码之前,与像素形状和像素透明度的逆变换相乘。本方法在包含用于提供傅立叶变换或者傅立叶逆变换的附加记忆单元以及乘法运算单元的相应装置中实现。